rider, or riding man

Latin, radman, or radchenistre

There appears to be no essential difference between a rider and a riding man (radchenistre). With four exceptions, all riders and riding men are found in the five countiesof circuit 5,
along the Welsh border. Their riding duties as escorts or messengers
were analogous to those performed by freemen in Cambridgeshire and it
seems probable that radmen were a class of freemen as, indeed, they were
described in one entryin
Gloucestershire (GLS 19,2). Their resources in land and teams were
comparable. There was also a marked resemblance between their duties and
the customary servicesdue from the drengsin circuit 6 and from a class of free men in Wessexdescribed in a late Anglo-Saxon estate survey.

For more detail, see L.H. Nelson, The Normans in south Wales, 1071-1171 (1966); and P.D.A. Harvey, 'Rectitudines singularum personarum and gerefa', English Historical Review, vol. 108 (1993), pages 1-22.